Remote bridge structure monitoring and prewarning method based on Internet of things technology

Abstract

The invention relates to a remote bridge structure monitoring and prewarning method based on an Internet of things technology. The remote bridge structure monitoring and prewarning method comprises the following steps of: (1) building a bridge model and calculating to obtain the dynamic deflection of a beam; (2) continuously acquiring data of monitored points to obtain a sequence [u] of the dynamic deflection, and carrying out forecast evaluation on the performances of a bridge system by using a specific mode based on a chaotic system, wherein the step (2) comprises the substeps of: (2.1) calculating a maximum Lyapunov index of the sequence [u]; (2.2) calculating the delay time and an optimal embedded dimension; and (2.3) carrying out fitting and contrast on the reconfigured chaotic time sequence to realize health monitoring and prewarning of a bridge structure. The remote bridge structure monitoring and prewarning method is used for analyzing the monitored data and precast evaluation on the future working state of a bridge to realize prewarning.

Description

technical field [0001] The invention relates to a remote bridge structure monitoring and early warning method. Background technique [0002] Bridge construction and maintenance are an important part of a country's infrastructure, and play an important role in national construction and people's lives. The safety and durability of bridge structures are highly valued by people. Issues such as health monitoring, safety assessment, and life prediction have become a new hot technology in the field of bridge engineering and civil public welfare engineering. [0003] Due to the particularity of the bridge engineering structure, once it is completed and put into use, in addition to the continuous degradation and aging of the material itself, it will also be affected by factors such as vehicles, wind, earthquakes, fatigue, overloading, and human factors, resulting in damage to the structure or components. Different degrees of natural damage and sudden damage. In the United States, a...

AI Technical Summary

Problems solved by technology

[0006] ⑴It can only do regular inspections, and can only determine the health status of the bridge at that time, and cannot guarantee the safe use of the bridge during the effective guarantee period

[0007] ⑵The data transmission is completed by wired cables, the line layout is complicated, the wiring is cumbersome, the installation cost is high, the later cable maintenance consumes a lot of time and energy, and the application has great limitations; the monitoring transmission distance is too far, and the bridge The weak signals of many sensors in the monitoring cause data distortion; the acquisition speed is slow, and the data interface and system integration ability are poor; this serial centralized monitoring system greatly affects the processing speed, reliability and flexibility of the system, and cannot To achieve real-time monitoring, the data lacks authenticity

[0008] (3) On-site load test can only be carried out, and traffic needs to be closed at the same time, affecting normal traffic operation

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